/
no-extra-non-null-assertion.test.ts
115 lines (113 loc) · 2.1 KB
/
no-extra-non-null-assertion.test.ts
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import rule from '../../src/rules/no-extra-non-null-assertion';
import { RuleTester } from '../RuleTester';
const ruleTester = new RuleTester({
parser: '@typescript-eslint/parser',
});
ruleTester.run('no-extra-non-null-assertion', rule, {
valid: [
{
code: `
const foo: { bar: number } | null = null;
const bar = foo!.bar;
`,
},
{
code: `
function foo(bar: number | undefined) {
const bar: number = bar!;
} `,
},
{
code: `
function foo(bar?: { n: number }) {
return bar?.n;
}
`,
},
],
invalid: [
{
code: `
const foo: { bar: number } | null = null;
const bar = foo!!!!.bar;
`,
errors: [
{
messageId: 'noExtraNonNullAssertion',
endColumn: 19,
column: 13,
line: 3,
},
{
messageId: 'noExtraNonNullAssertion',
endColumn: 18,
column: 13,
line: 3,
},
{
messageId: 'noExtraNonNullAssertion',
endColumn: 17,
column: 13,
line: 3,
},
],
},
{
code: `
function foo(bar: number | undefined) {
const bar: number = bar!!;
}
`,
errors: [
{
messageId: 'noExtraNonNullAssertion',
endColumn: 27,
column: 23,
line: 3,
},
],
},
{
code: `
function foo(bar?: { n: number }) {
return bar!?.n;
}
`,
errors: [
{
messageId: 'noExtraNonNullAssertion',
endColumn: 14,
column: 10,
line: 3,
},
],
},
{
code: `
function foo(bar?: { n: number }) {
return bar!!!?.n;
}
`,
errors: [
{
messageId: 'noExtraNonNullAssertion',
endColumn: 16,
column: 10,
line: 3,
},
{
messageId: 'noExtraNonNullAssertion',
endColumn: 15,
column: 10,
line: 3,
},
{
messageId: 'noExtraNonNullAssertion',
endColumn: 14,
column: 10,
line: 3,
},
],
},
],
});